IBM Selectric Maintenance Manual page 89

8. Deflector - Position the def1e.;:tor by forming the de-
flector supporting tabs on the front and rear feed roll
arms so that a clearance of .010" to .020" exists be-
tween the front and rear ofthe deflector and the platen
(Fig.
192).
Three tab cards inserted between· the platen
and the deflector (at the front and rear) should provide a
slight drag. No drag should be felt when one tab card
is inserted •
• 010"
To
.020"
FIGURE
192.
Deflector Adjustment
9. Paper Bai I
a. Bail Shaft - The shaft should be positioned in the
right hand bai I arm so that each arm can be pulled
forward the same distance from the platen before the
entire bail begins to move.
The adjustment insures that both bai I rollers wi
II
have equal pressure against the platen.
CAUTION: Be sure that neither bail arm is de-
flected left or right after the bai I shaft is tightened.
b. Bai I Stop - The lugs that stop the rearward movement
of the paper bail arms should be formed to obtain a
.005"
to
.010"
clearance between the lugs and the
bai I arms when the copy control lever is at its ex-
treme rear position.
The adjustment prevents interference between the
bai I arms and the
Ii
ne gage card holder when the
platen is removed.
JO. Line Gage Card Holder
a. Adjust the line gage card holder forward or back
for a
.005"
to
.010"
clearance with the platen.
b. The verti ca I adjustment shou Id be such that the
graduated edge is parallel to and
.002"
to
.005"
below the feet of the typed characters when viewed
from the operator's position.
c. Adjust the card holder left or right so that,the point
of a letter "V" will align with the mark in the mid-
dle of the line gage card holder.
NOTE: On pin feed platen machines, the gradua-
tions on the left hand card holder should be lined
up with the bottom of a series of V's.
FABRIC RIBBON MECHANISM
I.
Centering Springs - With the ribbon reverse interposer
centered, form the lugs of the ribbon feed plate for
.003"
to
.005"
clearance in the centering spring loops (Fig.
193). Form These lugs .
FIGURE
193.
Centering Springs Adjustment
The adjustment insures that the springs are not extended
when at rest and that they wi
II
properly restore the mech-
anism after a reverse operation.
2.
Ratchet Brake Spring - Form the left and right ratchet
brake springs so that each wi
II
hold its ratchet in posi-
tion after the ratchet has been manually rotated far e-
nough to fully actuate the reverse mechanism (Fig.
194).
Ratchet Brake Spring
I
.001"
to
.015"
FIGURE
194.
Ribbon Feed Plate Adjustment
The ratchets should be checked alternately with the cart-
ridge removed. The check as described is merely a meth-
od of testing for the correct braking action of the springs
and has little to do with the reversing action.
3. Ribbon Feed Plate - With the ribbon mechanism set for
a reversing operation and the ribbon cam at its high
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